[UNLOCK] [H815] Fastboot won't recognize my LG G4 in fastboot mode... - G4 Q&A, Help & Troubleshooting

First I must say, I searched all over the internet for answer to this problem. None of the topics I read had matched my problem.
I want to unlock my bootloader so I can flash custom recovery and get root access.
When I want to access the bootloader ("adb reboot bootloader"), in my phone all goes fine (I see on my phone the Fastboot instructions, etc). The problem is in my computer that fastboot won't recognise my phone anymore. When I want to get the device-id, fastboot is stuck on "waiting for all devices". When I want to see the list of devices, ("fastboot devices"), I get nothing, wether my phone is on bootloader mode or not.
I installed all the LG drivers, including the ADB one. I am in USB debugging mode, and I disabled OEM protection.
Android version is Lollipop.
I need help on this matter, thanks in advance.

notrium dweller said:
First I must say, I searched all over the internet for answer to this problem. None of the topics I read had matched my problem.
I want to unlock my bootloader so I can flash custom recovery and get root access.
When I want to access the bootloader ("adb reboot bootloader"), in my phone all goes fine (I see on my phone the Fastboot instructions, etc). The problem is in my computer that fastboot won't recognise my phone anymore. When I want to get the device-id, fastboot is stuck on "waiting for all devices". When I want to see the list of devices, ("fastboot devices"), I get nothing, wether my phone is on bootloader mode or not.
I installed all the LG drivers, including the ADB one. I am in USB debugging mode, and I disabled OEM protection.
Android version is Lollipop.
I need help on this matter, thanks in advance.
Click to expand...
Click to collapse
not all phones can be unlocked.. search for g4 list of bootloader unlock youll see the list if yours isnt there you cant . only root 5.1 no twrp.

raptorddd said:
not all phones can be unlocked.. search for g4 list of bootloader unlock youll see the list if yours isnt there you cant . only root 5.1 no twrp.
Click to expand...
Click to collapse
I know mine can be unlocked. I actually can get to the bootloader via ADB. The problem is that fastboot won't recognise my phone afterwards. (I believe it's the european version of the H815 model, and according to one-click-root app, my phone can be safely rooted. Also my Lollipop version is 5.1.)
There are other few issues also:
Fastboot won't recognise my phone, even if the phone is not in bootloader mode.
Windows will recognise all of the LG related drivers including the ADB related driver, while the phone is powered on normally.
However, it fails to do so, in bootloader mode. I see non working driver in Windows 7 Device Manager, under "Other Devices" by the name "Android" with yellow exclamation mark. Nothing else.
Still looking for advice...

notrium dweller said:
I know mine can be unlocked. I actually can get to the bootloader via ADB. The problem is that fastboot won't recognise my phone afterwards. (I believe it's the european version of the H815 model, and according to one-click-root app, my phone can be safely rooted. Also my Lollipop version is 5.1.)
There are other few issues also:
Fastboot won't recognise my phone, even if the phone is not in bootloader mode.
Windows will recognise all of the LG related drivers including the ADB related driver, while the phone is powered on normally.
However, it fails to do so, in bootloader mode. I see non working driver in Windows 7 Device Manager, under "Other Devices" by the name "Android" with yellow exclamation mark. Nothing else.
Still looking for advice...
Click to expand...
Click to collapse
am sorry i cant help ive nver unlocked mine..

Still looking for suggestions, people...

I have the same problem, adb detects my phone but fastboot does not. Same Phone btw

Still no solution until now ? I have the same problems
My device is H815

Hi !
I have had this problem too...solved with strong battle to understand myself...
My solution : when you have installed driver ,when your phone go to fastboot mode and the pc don't want to reconize the phone : on the pc on windows go to harware manager (config panel) and you can see in theory "android" with a "?" ==> you have to install manually the driver by searching somewhere on the harware list "android adb interface " (i don't remember where it is) ==> your phone wil be reconized ! And you will have the 2 lines of ID on the adb comand interface....and follow the tutorial...

I have read hundreds of issues with driver problems when it comes to windows.
Please try Linux instead. There are live distributions like Ubuntu available. Install it on USB stick and start from there.
No driver issues anymore. Just works.
.

@steadfasterX it need some knowledge for to use Linux OS for adb thingsv (unlock bootloader ,instal TWRP,rom,apps...etc...) ? maybe you can do a small tutorial for to help ?
For windows i have found these pictures for an eventual help (see ZIP on attach file)

@Loulou-13 , now i can see my device-id - solved -
but now have another problems, my imei is not match with my device-id ...
my device is H815

yes...i know i have sent an answer too late ... but my solution is one of this problem and eventualy can be useful for other people.
for your new problem ,what happen ? .......have you enter the corect number ,without space or other ?

Loulou-13 said:
@steadfasterX it need some knowledge for to use Linux OS for adb thingsv (unlock bootloader ,instal TWRP,rom,apps...etc...) ? maybe you can do a small tutorial for to help ?
For windows i have found these pictures for an eventual help (see ZIP on attach file)
Click to expand...
Click to collapse
Well there are hundreds of guides out there just use google...
adb and fastboot working the same way under Linux so there is no need to have a specific guide for linux.
I haven't tested that guide here but it looks very good as a starting point:
http://forum.xda-developers.com/showpost.php?p=44739402&postcount=1
As said there are other maybe better guides but Google will tell you.
.

@steadfasterX thank for your link ,it's useful for people who have problem and read this thread
It's not for me .... i have my bootliader unlocked ,twrp...( and this fabulous Imperium MM rom !!!! )

Related

[Q] Enter Fastboot mode with scrapped volume button, to relock the bootloader

Hello friends,
How to get into fastboot to relock the bootloader, if my volume button is dead? By dead, I mean the ribbon has been ripped off of the mobo (it was soldered onto mobo).
Since I'm a brand-new noob, the only way I know of and have done is to get into fastboot mode and lock it back up like what I did when I unlocked it. Any other way to lock it, ideally within the Android OS? Since my volume buttons are completely dead, I doubt that I can get into any "mode" other than OS right now..
TIA!
adb reboot bootloader.
I've seen that command in a post from search earlier, but there was no response after that post.
Would you explain the procedure? I am afraid that I might do anything wrong on top of these disasters i've gone thru with this phone
I also saw another line during earlier search: "if they don't know how to setup an adb command, they probably shouldn't unlock their phones"... Looks like I've done what I shouldn't..?
I would say doing whatever ripped the volume button cable out was what you shouldn't have been doing If you unlocked the phone you have the software you used to unlock, right? What software/guide did you use/follow? Are you using Windows/Linux/Mac? The only way to get to the bootloader w/o the volume buttons (afaik) is to use adb via usb. If you provide more details I can try to help you.
cswithxda said:
I've seen that command in a post from search earlier, but there was no response after that post.
Would you explain the procedure?
Click to expand...
Click to collapse
Once you're in adb reboot bootloader, do fastboot oem lock. Opposite of how you unlocked it in the first place
cswithxda said:
I've seen that command in a post from search earlier, but there was no response after that post.
Would you explain the procedure? I am afraid that I might do anything wrong on top of these disasters i've gone thru with this phone
Click to expand...
Click to collapse
navigate your cmd line to the folder with adb and fastboot in it. Hook the phone up to the computer and type:
Code:
adb reboot bootloader
which will make your phone reboot into the bootloader mode. You can then proceed with what you need to do.
I also saw another line during earlier search: "if they don't know how to setup an adb command, they probably shouldn't unlock their phones"... Looks like I've done what I shouldn't..?
Click to expand...
Click to collapse
I agree with whoever said that. This is another example of people messing with things before reading and learning how they work.
Thanks for your help guys!
btw, anyone found xdadevelopers to load extremely slower in Firefox when compared to Chrome? (just offtopic)
Anyway, I unlocked the bootloader when I was switching to yakju cmd and this folder called "fastboot-and-adb" in which there is both adb.exe and fastboot.exe. I used command "fastboot unlock bootloader" or something alike.
I'll do some more search and learn. Don't want you guys to think of me as a lazy bone who unlocked their bootloader using 1-click toolkit
p.s. edit: in my other thread, someone suggested using quickboot app.
Thanks for your replies guys!
martonikaj said:
navigate your cmd line to the folder with adb and fastboot in it. Hook the phone up to the computer and type:
Code:
adb reboot bootloader
which will make your phone reboot into the bootloader mode. You can then proceed with what you need to do.
I agree with whoever said that. This is another example of people messing with things before reading and learning how they work.
Click to expand...
Click to collapse
Somehow it says device not found
I do have proper driver (Naked Driver Beta 0.5 by 1wayjonny) that my phone was able to be recognized under bootloader at the time when I could actually get into bootloader. My phone is also being recognized as media device now... I have also turning usb debug on...
Try adb remount
The ad devices
This should list the serial number
Then all commands should work
Sent from my Galaxy Nexus using xda premium
cswithxda said:
Somehow it says device not found
I do have proper driver (Naked Driver Beta 0.5 by 1wayjonny) that my phone was able to be recognized under bootloader at the time when I could actually get into bootloader. My phone is also being recognized as media device now... I have also turning usb debug on...
Click to expand...
Click to collapse
You need to turn USB debugging on, and then type "adb devices" and see if it shows up. It may not using the Naked Driver; I had to install the full Samsung USB driver package before ADB would see my Galaxy Nexus.
If it does show up, then you type "adb reboot-bootloader" and it should boot into fastboot. Then just type "fastboot oem lock" and it will wipe the storage partitions and restore the bootloader lock.
Thanks for the help at late night guys. I finally got into the bootloader, thru a mac tho Kinda ironic that I am a supporter of Windows, well, at least a firm user of Windows.
Tried adb remount, it still says device not found
synaesthetic said:
You need to turn USB debugging on, and then type "adb devices" and see if it shows up. It may not using the Naked Driver; I had to install the full Samsung USB driver package before ADB would see my Galaxy Nexus.
If it does show up, then you type "adb reboot-bootloader" and it should boot into fastboot. Then just type "fastboot oem lock" and it will wipe the storage partitions and restore the bootloader lock.
Click to expand...
Click to collapse
I believe that you quoted my "I have turned USB debug on" ;p
Gave up on trying Windows drivers. When I was flashing the Yakju, I tried Samsung full driver, and it didn't work on my machine, i.e., the phone can't be detected in bootloader mode, while the beta 0.5 driver worked. So I decided not to mess with it anymore.
It looks like when the phone is not under bootloader, windows recognize it fine as MTP devices and install proper samsung driver from the internet directly. This allows me to open it up in explorer to browse files and such, but the phone won't show up under adb devices somehow.
Looks like MTP device (when the phone is in Android OS) and the fastboot mode use two kinds of drivers. This is just my assumption, though.
Anyway, finally got into bootloader now with Mac, and it's pretty funny I have to do everything thru command as the volume rockers are dead
And most importantly, thank you guys for your help!
Just another update
It's real funny now that the bootloader is locked, I can't unlock it again cuz I don't have the volume button working, so I couldn't choose YES on the phone.
I'm not trying to unlock it again, but just to confirm if there's really no work around, in case I encounter this situation again in the future
Lucky that locking the bootloader won't erase everything, or I won't be able to flash a ROM with it locked... :cold sweating:

Question on Fastboot USB drivers

I've previously managed to get my tokenID from htcdev without any problems on various handset but lately I've come across a few issues.
For example I'm trying to unlock the bootloader for this DesireHD but when trying to get the tokenID I get an error saying no devices attached.
My computer has installed the correct drivers and it shows up on device manager. I am able to 'adb devices' when the handset has booted up but when in fastboot / bootloader nothing comes up when running the same command.
Is it something to do with my Android SDK folder?
Is there a way to come around this because if I want to do similar process with other devices I need to understand what I need to do before.
Thanks
Schizophonic said:
I've previously managed to get my tokenID from htcdev without any problems on various handset but lately I've come across a few issues.
For example I'm trying to unlock the bootloader for this DesireHD but when trying to get the tokenID I get an error saying no devices attached.
My computer has installed the correct drivers and it shows up on device manager. I am able to 'adb devices' when the handset has booted up but when in fastboot / bootloader nothing comes up when running the same command.
Is it something to do with my Android SDK folder?
Is there a way to come around this because if I want to do similar process with other devices I need to understand what I need to do before.
Thanks
Click to expand...
Click to collapse
Adb does not work in bootloader, just with a fully booted device. You have to use fastboot command in fastboot usb

[Brick] Zenfone 2 ZE551ML 4GB/32GB

Hello,
I've bricked my phone and now it just turns on to bootloader, all options in bootloader except turn off just loops it back to bootloader where it says "continue the fastboot process".
I've download the xFSTK_ZE551ML but it won't install the moorefield driver it detect it for only a few seconds and then change to android-phone driver, i believe moorefield doesn't work on bootloader but i can get the phone to hang on something else.
I also can't acess via ADB, when i type adb devices, no device is found.
Also tried the Asus FlashTool, but the raw files i tried (WW_ZE551ML_2.15.40.13_20150506.RAW) didn't work, i believe because it's Android L and phone was on Android L.
I've searched alot but haven't found a solution, can someone point me in the right direction?
Thanks in advance.
What happens when you type "fastboot devices"?
Nothing happens with that command.
It's working now, after i tried several raw files, it worked with "WW_ZE551ML_2.20.40.194_20160713.raw".
I know it's sounds newbie since i've just oppened the thread, but it literaly spend all day yesterday following guides and installing stuff on my pc, anyway glad it's apparently solved.
Anyone stuck on bootloader like i was that can't use xFSTK_ZE551ML, install the "WW_ZE55t1ML_2.20.40.194_20160713.raw" with flash tools, this was the only one that worked for me.
Just a warning to anyone who visits this thread --- If you have bootloader-- DO NOT use xFSTK -- xFSTK is to install a temp bootloader to bricked devices and only used if you have NO bootloader .

adb waiting for device

When I enter bootloader to try and flash twrp.... I get the message "waiting for device"
Trying to flash TWRP
can anyone help?
ADB recognizes the device...as soon as I reboot into the bootloader.... it disconnects
Anyone?
no one?
bigd19888 said:
When I enter bootloader to try and flash twrp.... I get the message "waiting for device"
Trying to flash TWRP
can anyone help?
ADB recognizes the device...as soon as I reboot into the bootloader.... it disconnects
Click to expand...
Click to collapse
If you want helpful responses you have to be more specific. Assuming you have the fastboot files installed on your PC/laptop ... What LG G4 model? What software version? Bootloader Unlocked? etc.
Assuming you have installed on your PC/laptop LGMobileDriver_WHQL_Ver_4.2.0 available for download from the LG US site as the Windows driver can create issues, have you tried downloading and installing the "Official" TWRP app and installing that way?
Suggest if you are still having problems, you head over to: https://forum.xda-developers.com/g4/development/recovery-twrp-3-touch-recovery-t3442424
Read the OP thoroughly and post any issues you're having there.
sdembiske said:
If you want helpful responses you have to be more specific. Assuming you have the fastboot files installed on your PC/laptop ... What LG G4 model? What software version? Bootloader Unlocked? etc.
Assuming you have installed on your PC/laptop LGMobileDriver_WHQL_Ver_4.2.0 available for download from the LG US site as the Windows driver can create issues, have you tried downloading and installing the "Official" TWRP app and installing that way?
Suggest if you are still having problems, you head over to: https://forum.xda-developers.com/g4/development/recovery-twrp-3-touch-recovery-t3442424
Read the OP thoroughly and post any issues you're having there.
Click to expand...
Click to collapse
I have minimal adb and fastboot installed
device is h811 20v
bootloader is already unlocked
and yes I'm using LGMobileDriver_WHQL_Ver_4.2.0
sdembiske said:
If you want helpful responses you have to be more specific. Assuming you have the fastboot files installed on your PC/laptop ... What LG G4 model? What software version? Bootloader Unlocked? etc.
Assuming you have installed on your PC/laptop LGMobileDriver_WHQL_Ver_4.2.0 available for download from the LG US site as the Windows driver can create issues, have you tried downloading and installing the "Official" TWRP app and installing that way?
Suggest if you are still having problems, you head over to: https://forum.xda-developers.com/g4/development/recovery-twrp-3-touch-recovery-t3442424
Read the OP thoroughly and post any issues you're having there.
Click to expand...
Click to collapse
I have the right files, when I get into adb reboot into bootloader
it no longer recognizes the device. I cannot flash twrp
After reboot into bootloader, open your "windows device manager" and see if windows detects your device properly.
RuedasLocas said:
After reboot into bootloader, open your "windows device manager" and see if windows detects your device properly.
Click to expand...
Click to collapse
seems like a driver problem, need to keep removing and reinstalling in device manager for it to recognize my phone
I'm using the right driver...so I don't know what the problem is
quite annoying
windows xp I never have a problem with adb and fastboot.....windows 7 and up. ALWAYS
bigd19888 said:
seems like a driver problem, need to keep removing and reinstalling in device manager for it to recognize my phone
I'm using the right driver...so I don't know what the problem is
quite annoying
windows xp I never have a problem with adb and fastboot.....windows 7 and up. ALWAYS
Click to expand...
Click to collapse
Don't allow Windows 10 to update your drivers - you can set that up in Windows. Google it for the how-to.
bigd19888 said:
I have the right files, when I get into adb reboot into bootloader
it no longer recognizes the device. I cannot flash twrp
Click to expand...
Click to collapse
bigd19888 said:
seems like a driver problem, need to keep removing and reinstalling in device manager for it to recognize my phone
I'm using the right driver...so I don't know what the problem is
quite annoying
windows xp I never have a problem with adb and fastboot.....windows 7 and up. ALWAYS
Click to expand...
Click to collapse
The device type changes depending on "how" its connected. Windows can "see" it as a ADB device, MODEM, etc...
With the phone connected, uninstall all device related on windows device manager, refresh the device manager for it to detect the phone as it should be (as you need it to be detected).
Sometimes its needed a manual device driver install. Happens some times to me, unfortunately I don't remember exactly how I do it because the issues (when it happens) are kind of random, so, I need to "understand" what is going wrong and fix it.
Just to tell you that is nothing unfixable on the procedure, you just need to have patience and find out how windows is supposed to detect your device.
If you don't find out by yourself, tomorrow (Monday), I'll try to see on mine how it should be detected in fastboot mode and tell you. Today its already late for me...
Good luck
RuedasLocas said:
The device type changes depending on "how" its connected. Windows can "see" it as a ADB device, MODEM, etc...
With the phone connected, uninstall all device related on windows device manager, refresh the device manager for it to detect the phone as it should be (as you need it to be detected).
Sometimes its needed a manual device driver install. Happens some times to me, unfortunately I don't remember exactly how I do it because the issues (when it happens) are kind of random, so, I need to "understand" what is going wrong and fix it.
Just to tell you that is nothing unfixable on the procedure, you just need to have patience and find out how windows is supposed to detect your device.
If you don't find out by yourself, tomorrow (Monday), I'll try to see on mine how it should be detected in fastboot mode and tell you. Today its already late for me...
Good luck
Click to expand...
Click to collapse
everytime I boot into the bootloader the driver stops working.. when I boot the phone normally windows doesn't recognize my phone. it is unknown, so I remove the driver, reinstall it., get into bootloader and same issue persists "waiting on device:" I think the lg driver keeps crashing or it is windows issue
will try again tomorrow
bigd19888 said:
everytime I boot into the bootloader the driver stops working.. when I boot the phone normally windows doesn't recognize my phone. it is unknown, so I remove the driver, reinstall it., get into bootloader and same issue persists "waiting on device:" I think the lg driver keeps crashing or it is windows issue
will try again tomorrow
Click to expand...
Click to collapse
Your device should be seen as "LGE Android Phone" (if your lg drivers are good).
Now gonna be tricky because my OS is in Portuguese, I don''t know exactly the path name in English... use your imagination
Connect the device on a USB 2 Port !!!
In windows device manager, select "update driver", "search software on the computer", "allow to choose from a list of avalable drivers". unmark the "compatible hardware" and find on the list the needed drivers. If the "LGE" drivers don't work, try to download Universal ADB Drivers, maybe it works.
bigd19888 said:
everytime I boot into the bootloader the driver stops working.. when I boot the phone normally windows doesn't recognize my phone. it is unknown, so I remove the driver, reinstall it., get into bootloader and same issue persists "waiting on device:" I think the lg driver keeps crashing or it is windows issue
will try again tomorrow
Click to expand...
Click to collapse
I'm thinking it could be a corrupted LG driver. Download another from the LG US site, ONLY. Uninstall the one you have installed now, reboot and install the newly downloaded one. Then connect your phone and see if it is recognized and shown correctly in Windows Device Manager. Also, in adb type lsusb and see if the phone is listed in the output.
bigd19888 said:
everytime I boot into the bootloader the driver stops working.. when I boot the phone normally windows doesn't recognize my phone. it is unknown, so I remove the driver, reinstall it., get into bootloader and same issue persists "waiting on device:" I think the lg driver keeps crashing or it is windows issue
will try again tomorrow
Click to expand...
Click to collapse
Boss, no need to struggle with this ADB anymore.. there is a tool called FWUL which was created for people who have driver issues... Check it out here:
https://forum.xda-developers.com/an.../live-iso-adb-fastboot-driver-issues-t3526755
:good:

Help needed to Relock Moto Z Play (XT1635-02/RETGB) bootloader and update from 6.0.1

Ok guys I really need you help. I honestly feel like im losing it as I have not been able to make any progress with this. Believe me I have tried other threads to no avail....
Ok so, I bought this phone but the problem with it is that I cant use google pay due to its unlocked bootloader (bought it like this second hand). I'm on really old firmware (6.0.1, 1 September 2016 Security Patch) as you can see very behind from Oreo or whatever the latest firmware is because I cant get OTA updates due to the unlocked bootloader.
I'm literally just asking for a simple, noob friendly guide which will allow we to relock it and update to the latest firmware so my phone will be perfectly fine for work use.
Please guys. Apologies if I sound annoyed but this has been bugging me for ages. Let me know if I should add anything else.
Much appreciated guys!
EDIT: I Used this guide: https://forum.xda-developers.com/moto-z-play/how-to/guide-relock-bootloader-to-lasted-stock-t3718190 and followed it exactly and enable USB debugging but keep getting "<waiting for any device>"?
bump
Hmm, with the 'waiting for device' issue, do you have the Motorola drivers installed on the computer? https://support.motorola.com/uk/en/drivers Also, if you are running Windows 10 or 8.1, verify that you have driver signature enforcement disabled on your computer, so the Motorola fastboot driver can load properly: https://www.howtogeek.com/167723/ho...8.1-so-that-you-can-install-unsigned-drivers/ or you can try to manually load the fastboot driver when your device is connected to your computer. This should then help your computer communicate with your device when you boot your device to the bootloader for flashing the stock ROM.
Verify also that you have a high quality USB data cable (preferably the original cable) and that you've got your device connected to a powered USB 2.0 or 3.0 port. Double-check the communication between your computer and your device - boot your device to the bootloader, connect to your computer. Open the ADB terminal and enter 'fastboot devices' (without quotes) into the terminal. Press Enter. If communication is working, this command should return your device serial number.
For that guide as well, you do not need to be on a custom ROM to follow it. If you do get your device talking, then extract the stock ROM as per the guide to your ADB folder, and execute both sets of commands to re-lock your bootloader. Be aware that the re-locking will erase your device, so back up if you have not already. OTA updates are not dependent on unlocked/locked bootloader status - as long as you have a firmware build that was deployed on the retgb software channel, you should get OTA updates regardless of whether your bootloader is unlocked or not. However, as you correctly point out, Android Pay does care about the bootloader unlocked status, however, rooting with magisk (to hide your bootloader unlocked status) may help you get Android Pay working if you want to keep your bootloader unlocked. Depending on your work IT requirements though, you may want a locked bootloader and no root to be compliant with the IT regulations.
Good luck either way.
echo92 said:
Hmm, with the 'waiting for device' issue, do you have the Motorola drivers installed on the computer?.
Click to expand...
Click to collapse
I have now installed the program but get "There are no updates for your device at this time. Current Version: N/A"? My USB debugging is enabled.
Thanks for the detailed reply mate. Im going to get some new cables and follow your advice. Might take me a few days as i'm busy with work but definitely am looking forward to fixing my phone once and for all!
Omg it works. I downloaded the Motorola program and opened up adb minimal fastboot whilst in usb debugging. I just pasted everything and it started to work!...oh I also held the volume down button whilst the phone was turning on so it went to a screen with the android mascot. Then I pasted the codes to adbmininal fastboot.
Thanks for all you help mate !!
You can get OTA updates even if your bootloader is unlocked.

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